air condition pipe become freeze/icy

Asked by Xavi Sep 04, 2013 at 05:30 AM

Question type: Maintenance & Repair

i owned toyota wish 2009..what happen is the air con pipe become freeze/icy and it takes way long for the fan to cut-off

1 Answer
39,775

James answered 10 years ago

the evaporator under dash has a temp sensor bulb like a thermo couple on a stove,to regulate the flow of refridgent at the flow valve in the line coming in, if this line is away from the cold evaporator the sensor thinks the car is still warm and will not slow the refridgent or r12, r134 ect causing freezey pipes

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